Hinge boring bit



FIG. 1 is a perspective view of the hinge boring bit;

FIG. 2 is a plan view taken along the line of the cutting blade portion of the tool shown in FIG. 1;

FIG. 3 is a plan view taken along a line perpendicular to the cutting blade portion of the tool shown in FIG. 1;

FIG. 4 is a top view of the tool shown in FIG. 1; and,

FIG. 5 is a bottom view of the tool shown in FIG. 1.

The broken lines in the drawings depict unclaimed environmental subject matter. 

The ornamental design for a hinge boring bit, as shown and described. 